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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

Posted on 3 December 2013 by Kevin C

Thanks to the generosity of Skeptical Science contributors we are happy to report that Cowtan and Way (2013) is now open access and freely available to the public. We hope this will help to advance the discussion on coverage bias in the temperature record. We would like to thank everyone who has so generously contributed.

As a bonus, here is a poster which I took to the 2013 EarthTemp meeting at the DMI in Copenhagen last June. I was very fortunate to be able to attend this meeting, and talking to the experts there was critical to understanding the behaviour of air temperatures over sea ice - this led to section 5 in the paper and our more recent update.

Coverage of the paper has, predictably, ranged from the outstanding to the abominable. However some of the resulting conversations have already strengthened our results and are opening new lines of investiagation. My favourite quote is from William M. Connolley: "... anyone could have done it. Well, not quite, because they did it carefully". One of the things which still surprises me about our paper is that no one else beat us to it. And if it can be said of our work that "they did it carefully", then we have achieved one of our primary goals.

Any chance of getting the GMST monthlies from Cowtan & Way 2013 into WoodforTrees? I know we have the SkS calc, but I like to use WFT to avoid wading through a bunch of anti-SkS crap when the conditions include fake skeptics.

DSL: I'm working on monthly updates to the v1.0 hybrid data as we speak, which will go into the trend calculator straight away.

However I'd rather finish the v2.0 calculation based on separate reconstruction of the land and ocean data before we start pushing the results out to other sites. We've done a proof of concept for the update, which shows a number of benefits over the method in the paper, but to do it properly requires the whole HadCRUT4 100 member ensemble which is computationally demanding. I hope we will have a version out for the new year, although the uncertainties might not be done by then.

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